sintzenicfl



E. B. SINTZENICH (No Model.)

BALANCED VALVE.

No. 334,136. Patented Jan. 12, 1886.

Fig. 1.

Fig. 2.

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UNITED STATES PATENT QE TCE.

EDVIN B. SINT ZENIOH, OF ROCHESTER, NEYV YORK.

BALANCED VALVE.

SPECIFICATION forming part of Letters Patent No. 334,136, dated January 12,1886.

Application filed May 21, 1893.

To all whom it may concern:

Be it known that I, EDWIN B. SINTZENIOH, of Rochester, New York, have invented an Improved Balanced Valve for Steam-Engines, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to certain improvements on balanced valves for steam-engines, which improvements are hereinafter more fully described and specified.

My improved balanced valve for steam-engines is represented in the accompanying drawings, in which- .Figure 1 is a longitudinal section of a steamcylinder having my improved balanced valve applied thereto. Fig. 2 is a plan view of the slotted plate. Fig. 3 represents the face of the balance-valve.

In the accompanying drawings, representing my improved balance-valve, A is the piston of a steam-cylinder; B B, the cylinderheads; 0, the slide-valve; D, the valve-rod; E, the valve-rod gland; F, the cylinder-wall having steam-passages a a; G, the slotted plate; I, the outer cover, and L the recessed balance-plate.

My improved balance-valve is capable of being applied to the slide-valve of a steamengine of any ordinary construction. The piston-rod D is attached to the slide-valve in any preferred way, the mode of attachment shown in the accompanying drawings being by an eye orloop, b, secured on the end of the piston-rod and surrounding the body of the valve. The slotted plate G, which occupies the position of the steam-chest cover in engines of the usual construction, is fastened to the cylinder by the bolts K or other suitable means of attachment, its outer or upper surface being finished to a true plane and arranged parallel to the seat of the slide-valve O. In the back of the slide-valve is inserted the stud n, which passes through the recessed balance-plate L, and causes it to reciprocate to and fro with the slide-valve.

The balance-valve is provided on the side which bears against the slotted plate G with a recess, e, the area of which should be somewhat less than the area of the slide 0 ex- Scrial No. 95,647.

(No model.)

of the balanceplate, into which the packing- 7 ring r is fitted, which is pressed against the slotted plate G by any suitable springs, a, Fig. 1.

In order to prevent leakage of steam about the ring r, it is itself fitted into the groove in the balance-plate by one or more packingrings, 8, Fig. 1.

The ring r may be solid or divided, so as to be sprung into the groove, and the ring or rings 8 are sprung into a groove in the ring r in the same manner as piston-rings are ordinarily fitted to steam-pistons.

The springs behind the ring r in the recessed balance-plate will compensate for any slight difference in expansion in the parts; but in the case of small engines, or wherever it is desired to avoid the expense of the packingring 1, a recess may be formed in the boss t of the packing-ring, through which the stud it passes, and a spring, 0, introduced into it, by which the balancing valve is pressedagainst the plate G. In this case the stud n is provided with a nut, '0, on its outer end, against which the spring 0 bears.

The balance-plate is inclosed in an outer casing, I, secured to the plate G or to the cylinder by the bolts J J.

A suitable drip-cock may be provided on the casing. I

It will be observed that the parts are so proportioned that in the reciprocating motion of the balance-plate the edge of the recess only comes up to the end of the slot H in the plate G, so that steam is never allowed to escape from the steam-chest into the casing I.

My improved balance-valve may be applied to many forms of engine now in use, it being in the plate, and provided with the spring 0, particularly adapted for use on railway 1000- to compensate for expansion, substantially as 10 motive-engines. and for the purposes set forth.

I claim- The combination, with a steam-cylinder SINTZENIOH' and piston, of the slide-valve O, slotted plate Vitnesses: G, and balance plate L, attached to the slide- GEO. B. SELDEN, valve by a connection passing through the slot H. G. PHILLIPS. 

